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Title: Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction

Abstract

The majority of quasisymmetric stellarators to date have been designed by numerically optimizing the plasma boundary shape to minimize symmetry-breaking Fourier modes of the magnetic field strength B. At high aspect ratio, a faster approach is to directly construct the plasma shape from the equations of quasisymmetry near the magnetic axis derived by Garren and Boozer [Phys Fluids B 3, 2805 (1991)]. Here we demonstrate that the core shape and rotational transform of many optimization-based configurations can be accurately described by this direct-construction approach. This consistency supports use of the near-axis construction as an accurate analytical model for modern stellarator configurations.

Authors:
ORCiD logo [1]
  1. Univ. of Maryland, College Park, MD (United States)
Publication Date:
Research Org.:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); Simons Foundation
OSTI Identifier:
1597702
Grant/Contract Number:  
[FG02-93ER54197]
Resource Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
[ Journal Volume: 61; Journal Issue: 7]; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Landreman, Matt. Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction. United States: N. p., 2019. Web. doi:10.1088/1361-6587/ab19f6.
Landreman, Matt. Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction. United States. doi:10.1088/1361-6587/ab19f6.
Landreman, Matt. Thu . "Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction". United States. doi:10.1088/1361-6587/ab19f6.
@article{osti_1597702,
title = {Optimized quasisymmetric stellarators are consistent with the Garren–Boozer construction},
author = {Landreman, Matt},
abstractNote = {The majority of quasisymmetric stellarators to date have been designed by numerically optimizing the plasma boundary shape to minimize symmetry-breaking Fourier modes of the magnetic field strength B. At high aspect ratio, a faster approach is to directly construct the plasma shape from the equations of quasisymmetry near the magnetic axis derived by Garren and Boozer [Phys Fluids B 3, 2805 (1991)]. Here we demonstrate that the core shape and rotational transform of many optimization-based configurations can be accurately described by this direct-construction approach. This consistency supports use of the near-axis construction as an accurate analytical model for modern stellarator configurations.},
doi = {10.1088/1361-6587/ab19f6},
journal = {Plasma Physics and Controlled Fusion},
number = [7],
volume = [61],
place = {United States},
year = {2019},
month = {5}
}

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Works referenced in this record:

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